need help!!!!!!!!!!!!!

I have a 94' VW JETTA that I took into the shop to get an oil leak repaired. A few days later, I found the #53 fuse laying under the seat. I looked at the fuse board, but can't see were this fuse goes. There are a few different possibilities and I don't want to just plug it into the wrong spot. Is there someone who knows were this goes!!! Your help would be great!!